Coursera is one of the leading online certified website in the world from different universities like Harward, oxford and top Business schools among the world.
First, its not easy to get a certificate from here because you have to get atleast 75% to pass this course in all assignments and have to work hard through out the course.
First you need to register in coursera and then you have to start subscribe to a course which you want to do like web developing, Business english, computer management etc. After subscription you have to pay some amount of money like 3000 it depends upon the course.
There are some free courses which are available in coursera and if you want to do course which is not free then there is a option for the students to do but the thing is they have to complete this course within 7 days other wise they will not get any certificate if exceeds.
Finally its very much useful for those who want to learn new skill and it will also help you to get a job easily.